# From transactions, use ROW_NUMBER() to deduplicate by (user_id, product_id): keep only the latest tr

Canonical URL: <https://datadriven.io/problems/from-transactions-use-rownumber-to-deduplicate-by-user-fc7241df>

Domain: SQL · Difficulty: medium

## Problem

From transactions, use ROW_NUMBER() to deduplicate by (user_id, product_id): keep only the latest transaction per user-product pair. Return transaction_id, user_id, product_id, transaction_date, total_amount. Order by user_id, product_id.

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